You have to list the `code`s first, and then get the IPs from there

const { keys } = await env.KV.list();
const ips = new Set();
for(const { name } of keys) {
  ips.add(await env.KV.get(name));
}
console.log(Array.from(ips.values()));

const { keys } = await env.KV.list();
const ips = new Set();
for(const { name } of keys) {
  ips.add(await env.KV.get(name));
}
console.log(Array.from(ips.values()));

const ips = new Set();
let cursor = undefined;
while(true) {
  const result = await env.KV.list({ cursor });
  for(const { name } of result.keys) {
    ips.add(await env.KV.get(name));
  }
  if(result.list_complete) {
    break;
  }
  cursor = result.cursor;
}
console.log(Array.from(ips.values()));

const ips = new Set();
let cursor = undefined;
while(true) {
  const result = await env.KV.list({ cursor });
  for(const { name } of result.keys) {
    ips.add(await env.KV.get(name));
  }
  if(result.list_complete) {
    break;
  }
  cursor = result.cursor;
}
console.log(Array.from(ips.values()));